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https://issues.apache.org/jira/browse/DERBY-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12575819#action_12575819
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A B commented on DERBY-2998:
----------------------------

> I'll give it a shot!

Probably not something that should be rushed :)  Post 10.4 is fine with me, I 
was just looking for a clear update on that issue.  The filing of DERBY-3505 is 
good enough for me right now.

> Add support for ROW_NUMBER() window function
> --------------------------------------------
>
>                 Key: DERBY-2998
>                 URL: https://issues.apache.org/jira/browse/DERBY-2998
>             Project: Derby
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Thomas Nielsen
>            Assignee: Thomas Nielsen
>            Priority: Minor
>         Attachments: d2998-10.diff, d2998-10.stat, d2998-11.diff, 
> d2998-12.diff, d2998-12.stat, d2998-13.diff, d2998-13.stat, d2998-14.diff, 
> d2998-14.stat, d2998-15.diff, d2998-15.stat, d2998-16.diff, d2998-16.stat, 
> d2998-17.diff, d2998-17.stat, d2998-18.diff, d2998-18.stat, d2998-19.diff, 
> d2998-19.stat, d2998-4.diff, d2998-4.stat, d2998-5.diff, d2998-5.stat, 
> d2998-6.diff, d2998-6.stat, d2998-7.diff, d2998-7.stat, d2998-8.diff, 
> d2998-8.stat, d2998-9-derby.log, d2998-9.diff, d2998-9.stat, 
> d2998-doc-1.diff, d2998-doc-1.stat, d2998-doc-2.diff, d2998-doc-2.stat, 
> d2998-followup-2.diff, d2998-followup-2.stat, d2998-followup-distinct.diff, 
> d2998-followup-distinct.diff, d2998-followup-distinct.stat, 
> d2998-followup-doc3.diff, d2998-followup-doc3.stat, 
> d2998-followup-issue1.diff, d2998-followup-issue1.stat, 
> d2998-followup-issue4.diff, d2998-followup-issue4.stat, 
> d2998-followup-removeunused.diff, d2998-followup-testsuite.diff, 
> d2998-followup-testsuite.stat, d2998-test.diff, d2998-test.stat, 
> d2998-test2.diff, d2998-test2.stat, d2998-test3.diff, d2998-test3.stat, 
> d2998-test4.diff, d2998-test4.stat, d2998-test6.diff, d2998-test7.diff, 
> d2998-test8.diff, d2998-test9.diff, rreffuncrownumber.html
>
>
> As part of implementing the overall OLAP Operations features of SQL 
> (DERBY-581), implement the ROW_NUMBER() window function.
> More information about this feature is available at 
> http://wiki.apache.org/db-derby/OLAPRowNumber
> DERBY-2998 implements 
>   - framework code for windows and window function result columns.
>   - the ROW_NUMBER() window function according to SQL2003
> but the implementation is limited by
>   - only supporting an empty, unnamed, inline window definition (i.e the 
> full, unordered resultset)
>   - not being fully optimized

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